Lakeland, Florida -- Polk County Sheriff Grady Judd says a 12-year-old girl committed suicide earlier this week after she was bullied online by more than a dozen girls. He says the sheriff's office is now investigating the cyber-bullying.

After gathering sufficient evidence, Sheriff Judd recounted the tragic events of Rebecca's final moments and confirmed she did indeed commit suicide by jumping off a tower.

Sheriff Judd said his investigative team is still unraveling the online squabbles between Rebecca and about 15 girls.

He said the bullying began over a boyfriend. In November, she ran away and in December she was hospitalized for three days after cutting herself. There were school fights and at that point the school stepped in to separate the girls' schedules and, later, Rebecca even changed schools.

But the bullying continued online, on sites such as Ask.fm, Kik, Instagram and Voxer.

"We found on Rebecca's Internet search engines, or search questions: What is overweight for a 13-year-old girl? How to get blades out of razors? How many Advil do you need to take to die?"

Judd said as 7:37 Monday morning, Rebecca texted a boy she had met online in North Carolina from the cement tower where she died saying she was jumping and she couldn't take it anymore.

Judd said he never told anyone.

When pressed on whether the sheriff's office would file any charges against the girls who allegedly bullied her to the point her mother pulled her out of Crystal Lake Middle School, Sheriff Judd said the investigation continues and, if necessary, cyberbullying or stalking charges would be made.

He added that the parents to all 15 girls have cooperated with detectives and several cell phones and laptops have been confiscated.

You can read more about your school district's bullying policy by clicking the links below: